yaar ATA, dekho, I am a brit, I live in USA and I lived in pakistan so it allows me a rather unique perspective n this case. While I agree that there are some words that are used in UK and not in US, however there is more to the difference than those words, some phrases and pronunciations like schedule for example.
Its not as if fresh arrivals from pakistan to UK go mainstream right away because they speak the same lingo. and its NOT about the accent I am going on about